Author: britrifles
Subject: Effect of Primer Selection on Muzzle Velocity
Posted: January 27 2025 at 3:56am
Well, truth be told, I’m seeing larger lateral dispersions too, particularly on this last test that had a whopping 140 fps ES. But I’ve been ignoring these during the tests looking for the cause of vertical spreads.
Subject: Effect of Primer Selection on Muzzle Velocity
Posted: January 27 2025 at 3:56am
Well, truth be told, I’m seeing larger lateral dispersions too, particularly on this last test that had a whopping 140 fps ES. But I’ve been ignoring these during the tests looking for the cause of vertical spreads.
I just borescoped the barrel after soaking in Hoppes 9 since Saturday afternoon, it is quite dark with carbon. But, it feels smoother pushing patches thru than it does after cleaning to bare steel with C4. I’m going to shoot the rifle a few more times letting the carbon harden up. If it doesn’t improve, I’ll replace the barrel.
One other thing I’ve noticed. High velocity shots go high, but they also go right. Low velocity shots go low-left. It’s quite noticeable. Either the bolt locking lugs don’t have even contact or the scope affects the way the action bends under load. The scope mount is quite stiff and screwed to the left side of the action body, so there could be a tendency for the action to bend towards the right (pointing the muzzle to the right). The amount of deflection would be proportional to the thrust load on the bolt.